In this paper we study higher-order processes in temporal networks through the simplest examples of a higher-order interactions, the evolution of the node triplet, three nodes and all three potential edges between these three nodes. Our method looks at the evolution of a network through the relationships of three nodes as shown in the top row of Figure REF .
 Studying the evolution of relationships in a network by focussing on just three nodes has a long history as this includes the process where a path of length two connecting three nodes turns into a triangle as in triadic closure [1]}, [2]}, [3]}, [4]} which underpins many other concepts such as structural holes [5]}.
